rudin



J an. 9, 1923. 1,442,004.

K. V. RUBIN. ZERO SETTING MECHANISM FOR MACHINES OF THE TRINKS TYPE.

FILED OCT. 31. 918. 2 S.HEETSSHEET l.

L7. 42 EVI/II/I/I/IA '1 41 i 3.9 58

Patented Jan. 9, 1923.

UNITE! STATES KARL VIKTOR RUBIN, OF STOCKHOLM, SWEDEN.

ZERO-SETTING MECHANISM FOR MACHINES OF THE TRlNKs TYPE.

Application filed October 31, 1918. Serial No. 260,550.

(GRANTED UNDER THE PBOYISIQNS OF THE ACT OF MARCH 3, 1921, 41 STAT. L., 1313.)

To all whom it may concern:

Be it known that I, KARL Vrnron RUBIN, subject of the King of Sweden, residing at 12 Karduansmakregatan. Stockholm. Sweden, have invented certain new and useful Improvements in Zero-Setting Mechanisms for Machines of the Trinks Type (for which I filed an application in Sweden June 22. 1917, No. 1896/17), of which the following is a specification.

This invention relates to means for zeroizing, after each calculating operation. the curve-discs of calculating machines having setting wheels with a variable number of teeth.

One object of the invention is to provide means independent of the above named means. for locking the curve-discs. when set. so as to prevent them from being thrown out of position during the calculating operation. that is to say. during; the rotation of the setting mechanism in one direction or the other.

Another object is to provide a zeroizing mechanism by means of which the curve discs. should not the zeroizing operation be completed, are retained in such manner that another setting of the same and, consequently, another calculating operation is made impossible, until the zeroizing operation is completed.

A further ohject is to so. construct the nvcchanism that the rotation of the setting mechanism and. consequently another calulating; operation, whose resuit would be incorrect. are made impossible, if the set ting of the curve-discs for another calculating: op ration be effected or the Zeroizing mechanism be actuated prematurely.

The invention is applicable to calculating machines having a shaft passing through the setting mechanism of the machine and so connected with the curve-discs that the laticr. when set. rotate the shaft in one direction. the shaft being connected with a zero-- izing member accessible from the outside of the ma hine in such a manner that the shaft. when actuated by said member. is rotated in the opposite direction thus returnin; 7111 the curve-discs to zero-position.

The characterizing main feature of the invention consists in that the said shaft is placed within the peri hery of the setting Wheels and the curve-discs.

By this the advantage is obtained that no separate space is necessary for the zeroizing mechanism which otherwise is the case. as in the devices of this kind hitherto known.

Two embodiments of construction are by way of example illustrated in the accompanying: drawings in which- Fig. 1 is a side-view oi a curve-disc with a setting-wheel constructelil according to the invention. Fig. 1 is a modified form of the device shown in Fig. 1. Fig. 2 shows a disc of the zeroizing mechanism viewed from one side and constructed according to one embodiment. Fig. 3 is a side-view of another disc of the same embodiment. Fig- 4 is asideview of details of the locking mechanism for the curve-discs and the handle. Fig. 5 is a front-view. partly in section. of the device shown in Fig. 4. Fig. 3 is a front-view ot' the discs shown in Figs. 1 to 4, when joined together in position of the shaft of the setting mechanism. Figs. 7 and 8 Show side-views of two discs of the yeroizing mechanism according to the second embodiment. and Fig. 9 is a front-v ew ot the total zeroizing mechanism according to said second embodiment.

Referring to Figs. 1 and 6 to 9, the setting mechanism of the machine consists, as

usual. of setting wheels 1 with curve-alias 2. The curve-discs are. in well-known manner. provided with setting handles 3 and. besides. with internal teeth 4 (Fig. 1) engaging wheels 5 located on a shaft 6 passing' through the setting mechanism of the machine. The setting wheels and the curve-discs are provided with slots 49 and 50, respectively tor the shaft 6 effecting the settingof the Wheels and the discs. Ti the machine is provided with a result or indiiating mechanism. said shaft 6 may consist of the. shaft of said mechanism; The shaft 6 is provided with pins or lugs I. one for each wheel said wheels 5 being loosely jonrnallcd on the sha t 6 in such a manner that the shaft. when setting: the curve-dis s by means of similar pins or lugs 8 secured to the wheels 5. is carried along: during the rotation of thc wheels 5. In this manner the shaft 6 is set to a position corresponding to the position of the curve-disc in which the greatest number of teeth project. At, the one end the shaft 6 is provided with a toothed wheel f) or the like (Fig. 2) gear ing with an internally toothed wheel or segment H) secured to the shaft of the setting wheels. The number of teeth of said wheel I" is So adjusted as to allow the wheel I) to make a. complete revolution. Placed at the end of the gear or segment 11) is a lug or stop ll adapted to be actuated by the zcroizing member proper, as described below.

According to the embodiment shown in Figs. 1 to 6 said member consists of a suitable number of, say four, bell crank lovers 1). pivotally joulnalled on a. disc 11% which is pivotally journalled on the shaft 14 of the setting discs. Said hell crank levers are journalled on pins 15 and provided with rods v16 extending through slots 18 in the disc 13. the slots being so sized as to allow the rods 16 to move sideways The rods are provided with angular projections 19 (Fig. 6) capable of engaging the lug; ll of the corresponding toothed Wheel 10. The bell crank levers 12 are Springnctnatcd in such manner that the projections 19 gencr ally ass the lug 11 of the toothed wheel 10. hen actuated. the bell. crank lovers are turned so as to put the projection 19 in the path of the lug 11. thus carrying along; the

Wheels 10 and 9.

Splined to the shaft i4 is a toothed scotor 17 (Fig. 3) along the periphery of which the rods 16 of the bell crank levvrs 12 slide during the rotation. Thus the lcvers are retained in their turned out posh tion maintaining the engagement with the lug .11. The toothed sector is common to all the bell crank levers engaging them in turn. and the length of its periphery corresponds to a fourth of the circular path of said levers.

When being set, the curve-discs are actuated in a Well-known manner by pawls 20 (Figs. 1 and 6') actuatml by the spring- 2i and the hook-shaped portion 22 of which is in engagement with teeth 23 disposed on the curve-disc. The pawls 20 are pivotally journalled on a shaft 24 passing through the setting: mechanism of the machine. The curve-discs are set step by step. while subjected to the yielding eng 'agclnent with the pawls 20.

Preferably. the curvc discs are lorkcd in any way during the calculatin operation. that is to any. during the rotation of the sch ting mechanism in onv direction or the other. for the purpose of not hein; removed from the adjusted position during: the cal culating operation. This is obtained. according to the present invention. by the in ternal teeth 23 of the curve discs engaging a shaft or bar 25 passing through the set ting mechanism and secured. at the one end, to an arm 26 (Fig. 2) and. at the other end, to one portion of a bell crank lever 27 pivotally journalled on a pin 28 (Fig. 4). The

arm 26 and the lever 27 are pivotally mountrd on the frame of the machine or any mmnbcr extending therefrom. The bar 25 is actuated by the zeroizing member. so as to be brought into such a position in rclntion to the ourvcdisrs. if the rcroizingopcr:l tion should not be completed, that the curvediscs are unable to be moved to and rctainml in another setting position.

For this purpose the bar 25 is in enhancnient with one arm of a. pawl 29 (Fig. 2) pi votally mounted on the shaft 24 which jonrnalled in the frame. the other arm of the pawl 29 engaging a ratchet wheel 30 pivot ally journalled on the shait l4 and fixed to the disc 13, said ratchet Wheel. being pro vided with indentnres ll corresponding in number to the zeroizing members (the hell crank levers l2) and, consequently. in the present case four in number. the pawl 29 being adapted to engage said indentures. In the position shown in Fig. 2 the member. assume zero-position. Un the setting of the curve-discs the toothed wheel 10 is turned in the direction of the arrow in Fig. 2 through a greater or smaller angle in corre Spondence with the maximal turning: of the curve-discs. the toothed wheel then beimr locked in said position by means of the dcvire described below. (in the 'lzcroiziug," oporation cl'l'ectcd after the completion of tho milcuhitiny' operation the toothed wheol 10 is turned in a i.. 'ection opposite to the arrow in i ig. 2, owing to the engagement of the correspomlingr bell crank lever 12 with the lug ll. the pawl 29, on account of the 'etchet wheel 30 being carried along by the disc 13 during its rotation. moving outwards and sliding: on the periphery of the ratchet wheel and then. after the zeroizing; opera-- tion is completed. cahhing again into the next indentnrc ill.

Should not. however. the zeroinin; operation be completed. the pawl 29 stoppinzr be tween two indenturcs iii. the pawl in such case is turned. for a Short space to the right in Fig. 2. and owing thereto a rod 32 passing: through the setting mechanism of the machine is moved inwards towards the con tor of the disc. :\t the one and. said rod is secured to the pawl :39 and at th s other end in a link 33 vonncviing the rod with the shaft .34. The rod 32 is so placed aboveoach of lhe pawls; .20 that the rod. in tho abovementioned posili n oi ihc per l ill and the rod 313. moves the pnwla HI out of ongagre-ment with the teeth i of th curve discs 2. and oonsc ucnl ly. the currudisis thereby being disengaged from the shall no stepwise setting of said discs is possible.

Fig. l. shows a modification oi the iiQTli'C for setting the curve discs step by step. This device difi'ers from that shown in Fig. 1 only in that the shaft 25, instead of hearing directly against the teeth 23, bears ill) against the upturned end of the pawl 20. Ai-cording to Fig. l the engagement between the. pawls 20 and the bars 25, on the one hand, and the teeth 23, on the other hand, is divided between two points for each curved disc, whereas in Fig. l said engagement is effected. in one point only.

To prevent unintentional turning of the toothed wheel 10. for instance during the calculating operation, said wheel is preferably provided with a spring-actuated pawl 2H adapted to engage teeth 35 disposed on the disc 13. Thus the wheel 10 may be turned, during the setting of the curve discs, in the direction indicated by the arrow in Fig. 2, the wheel being prevented from turning unintentionally.

The mechanism for locking the curve discs is besides, so constructed that it depends to a certain extent on the position of the handle. For this purpose the bell crank lever 27 supporting the bar 25 is so arranged in rela tion to a double-armed lever 36 manageable by means of the handle and pivotally mounted on the pin 37, that the bell crank lever 27 together with the bar may be swung downwards to the left in Fig. 4c in the position of repose of the handle (Fig. 5), thus permitting the bar 25 to yield in relation to the teeth 23 of the curve discs, said swinging movement being prevented in the operative position of the handle.

To this purpose the handle is provided, as usual, with a pin 38 moving in the position of repose oi the handle a bar ill towards the machine, while counteracting a spring 39. The inner end of the bar 40 engaging the lower arm of the lever 36 introduces said arm into a recess 42 between two lugs 41. Consequently, in this position of the handle and the lever 36, the lever 27 is capable of moving freely downwards to the position shown by stippled lines in Fig. 4.. The handle assuming operative position, the bar -10 moves, owing to the action of spring 39, to the right in Fig. 5. the lever 36,on account of its sliding movement on one of the lugs 4L1, turning, on the commencing rotution of the setting mechanism. its'lower arm outwards and its upper arm inwards. Owing thereto, the lever :27 being unable to swing downwards. the bar 25 will be forced outwards in cngagelnent with the teeth of the curve discs. thus locking the latter. as will appear from 4.

From this it follows. on the one hand, that another calculating operation cannot be ef' fected, before the handle is locked in its p sition of repose, and. on the other band, that, should not the setting of the curve discs be quite correct in case of one tooth 23, for instance. stopping over against the bar 25 (an incompletely adi usted value), the handle and the setting mec anism cannot be turned on account of the upper arm of the lever 36 being unable to turn inwards coinpletel in this position of the bar as, the lower arm, therefore being incapable of being moved by the lugs 41.

In the example of construction illustrated in Figs. 7 to 9 the zero-izing mechanism is somewhatmodified. The arrangement ol shaft (5 and toothed wheel 9 similar to that shown in Figs. 1, 2 and 6. In this case, however, said wheel gears with a toothed wheel 43 journalled on the shaft 14 of the setting mechanism and having the same number of teeth as wheel 9. J ournalled at the side oi said wheel 43 another wheel ll engaging a toothed wheel 45 having pretcrably double the number of teeth of the wheel 44. The wheel 45 is connected with u. thumb-screw 46 or the like.

The Zeroizing operation is eti'erted in this case by turning the zeroizing member proper (the thumb-screw) through an angle of L8H, whereas the said operation is effected in the embodiment shown in Figs. 1 to 6 by rotating the zeroizing member (the hell crank lever 12) a quarter of a revolution.

ln Fig. 7 the different members assume the zero-position. On setting the curve discs for performing a. calculating operation the wheel 9 should be able to rotate freely, i. e., to follow the mo-ven'ient of the. curve discs. To this purpose one tooth is removed from the wheel 43 (Figs. T and 8)it being observed that the wheels 44 and 45 are supposed to be left out in Fig. Fl-nnd owing thereto the wheel fl can be rotated by any number of teeth. for instance four, as shown in Fig. 8. After the completion oi the calculating operation the zeroizing m the curve discs is to be effected. The thumb-screw 4-13 is turned through hall a revolution in the direction of the arrow, the wheel 4% there by being turned a revolution in the direction of the arrow. At the same time the wheel 43 is carried along. its teeth turning the wheel 9 back by four teeth and consequently to zero-rmsition. (ontinued turning oi the wheel 43 will be of no influence on the wheel 9 and the curre-disrs. because (it the wheel 9 also being without one tooth. In case oi the curve-discs not being adjusted to any value. the wheel 9. consequently, ran be turned independently of wheel iii and the latter indepemlently of wheel 5'.

Though in the drawing the wheels i and 44, for the purpose f clearncss, are up posed to consist ol two separate wheels bu ing different diameters. said wheels may be joined together t Form a single wheel lIH\'-- ing teeth oi double the length. in this case one o l the teeth is to be half truncated in order to obtain room for the free movement of the wheel 9.

For the purpose of preventing the wheel from being turned too far, for instance in case of rapid setting of the curve discs, an

T ll

lid

:uhlill'iual looiiu-d uhcrl ii is disposed on the shalt o a! the side oi" the wheel 9, said Win-ti i; lacing en ggancil by a pawl lreh erahiy. said pawl u ilouhle armed. one of The operation of the device will appear from the aho eseription and the drawing and will. the Jere. he omitted.

Obviously, the device may he modified in many respects without deviating from the principles oi the invention.

Claims:

1. In a calculating machine of the Prinks type. setting disks having adjustable teeth and cam disks actuating said teeth, said disks having openings between their centers and peripheries. a sha 't on which said disks are mounted. a setting shatt passing through said openings of said disks. a toothed gear on said setting shaft, a toothed element mounted on the first named shaft. and a zeroizing member comprising a disk arranged at one side of said toothed element. adapted to be manually turned from Without, and hell crank levers mounted on said disk and arranged for successive engagement with said toothed element.

2. In a calculating machine of the Trinks type. setting disks having adjustable teeth and cam disks actuating said teeth. and also provided with internal teeth. and means for set h s; the curve disks step-liw-step. said means comprising a pawl to engage said internal teeth. and zeroizing mechanism by which said pawl is actuated. and including means to completely release the pawl from the corresponding cam disk in the event of defective seroizing operation.

3. In a calculating machine of the Trinks type. setting disks having adjustable teeth and cam disks actuating said teeth, and also provided with internal teeth. and means for setting the cam disks step-by-step. said means comprising a pawl to engage said internal teeth. and zeroizing mechanism by which said pawl is: actuated. and including means to completely release the pawl from the corresponding cam disk in the event of detective mioizing operation. said releasing means ncluding. an actuating bar passing through the setting mechanism. a link attached to one end of said bar. and a zeroizing-mechunisex-actuated element at the other end ol' said bar.

i. In a calculating: machine of the Trinks type. setting disks having adjustable teeth and ram disks actuating said. teeth. and also n'ovidcd with internal teeth. and means for setting the cam disks step-hy-step, said means comprising a. pawl to engage said in ternal teeth and zeroizing mechanism by which said pawl is actuated, and including means to completely release the pawl from the corresponding cam disk in the event of: defective ze-roizing operation. said releasing means comprising an actuating bar passing, through the setting mechanism, a link attached to one end of. said bar, a pawl at the other end of said bar, and a ratchet wheel tor engagement by said pawl and arranged to rotate with the zeroizing mechanism.

5. In a calculating machine of the Trinks type, setting disks having adjustable teeth and cam disks actuating said teeth, and also ]'H'()Vlf.l9(l with internal teeth. and means for setting the cam disks step-by-step. said means comprising a pawl to engage said internal teeth. and zeroizing mechanism by which said pawl is actuated, and a bar yieldingly engaging the teeth of each cam disk.

6. In a calculating machine of the Trinks type, setting disks having adjustable teeth and cam disks actuating said teeth. and also provided with internal teeth, and means for setting the cam disk step-by-step, said means comprising a pawl to engage said internal teeth. zeroizing mechanism by which said pawl is actuated, and a bar yieldingly engaging the teeth of each cam disk, an arm secured to one end of said bar, and a bell crank lever having one arm secured to the other end of said bar and the other arm arranged for actuating by the handle of the machine.

7. In a calculating machine of the Trinks type. setting disks having adjustable teeth and cam disks actuating said teeth, and also provided with internal teeth. and means for setting the cam disks step-by-step. said means comprising a pawl to engage said internal teeth. zeroizing mechanism by which said pawl is actuated. a bar yieldingly engaging the teeth of each cam disk. an arm secured to one end of said bar. a bell crank lever, having one arm secured to the other end of said bar, and the other arm arranged for actuation by the handle of the machine. and a double armed lever actuated by the handle of the machine and so arranged with respect to the bell crank lever as to enable the latter to he swung. together with the bar, independently of the double armed lever. only when the handle is in the position of repose, and thus cause the bar to yield in relation to the said internal teeth of the curve disks.

In testimony whereof I aflix my signature in presence of two witnesses.

KARL VIKTOR RUBIN.

Witnesses A. E. CARLSSAN, CARL LAYER UIBT. 

